The Boeing Company
http://www.boeing.com/

Pratt & Whitney
http://www.pratt-whitney.com/

Watercraft Performance Specialists
http://members.tripod.com/~WPS_Inc/

Nye Thermodynamics
http://www.gas-turbines.com

Rolls-Royce Allison Engines
http://www.allison.com/

General Electric Aircraft Engines
http://www.ge.com/aircraftengines/

Rolls-Royce Gas Turbine Engines, Canada
http://www.rrgte.ca/profile.htm

Orenda Aerospace Corporation
http://www.orenda.com/

Bell Helicopter Textron
http://www.bellhelicopter.textron.com/

VDS Racing Engines
http://www.vdsracingengines.com